Bab fob beateb-eixgine  bolls



A. M. MCPHILLIPS Feb. 17, 1931.

BAR FOR BEATER ENGINE ROLLS Original Filed Nov. 1, 1927 gwuantoz $71M? 1 Reissued Feb. 17, 1931 PATENT oFFicE ARTHUR M. McPHIL-LIPS, or IBELOIT, WISCONSIN BAR FOR BEATER-ENGINE ROLLS Original No. 1,674,911, dated .Tune 26, 1928, Serial No. 230,281, filed November 1, i927. Application for reissue filed October 30, 1930. I Serial No. 492,27Q.

This invention relates to beating engines for'macerating paper stock and has special reference to the beater bar or knife, the object being to provide a beater barby the use ofwhich a more complete circulation and disintegration of the stock than has heretofore been possible will be-attained. The invention is illustrated in the accompanying drawing and will be hereinafter fully described,

' the novel features being particularly pointed out in the appended claims.

In the drawing, Fig. 1 is a plan view of a beater roll having the present invention embodied therein;

Fig. 2 is an end View of a portion of the roll;

Fig. 3 is a View showing two of the bars in elevation.

The beater roll is mounted in the tank or tub in the usual or any approved manner and consists of disks, one of which is indicated at 1, secured upon a central shaft 2, beater bars or knives 3 extending parallel with the shaft and held to the disks by end rings 4', and wedge blocks 5 driven between adjacent knives or bars to maintain them in fixed spaced relation. Generally the bars or knives 3 have their inner edges seated in recesses provided therefor in the edges of the several disks, and the end rings engage in notches 6 in the ends of the knives so that when the several parts are assembled the knives will be very firmly secured. In the outer or working edge of each knife or bar, spaced notches or crenels 7 are formed and the bars are arranged so that thenotches in adjacent bars are staggered, each notch in each bar being alined circumferentially of the roll with a lug or merlon 8 between two notches in the adjacent bars. It will be noted, more particularly upon reference to Fig. 3, that the opposite outer corners of alternate bars are cut away, as at 9, on lines corresponding to the contours of the notches 7, so that the staggered notch structure is carried to the eX- treme ends of the beater roll.

In other words, each bar has an equal number of crenels and merlons, so the working edge of the bar begins with a merlon and ends with a crenel. In placing the bars in the roll a1- ternate bars are reversed, thereby bringing the merlons of eachbar opposite crenels in the bars on each side of it. [Preferably the merlons and crenels are of equal length and are sufficiently limited innumber to give the merlons a substantial width.

The heater roll is rotated in the tank in the usual manner to cause the bars to successively impinge upon and work through the stock.

The notches'help the working edges'of the bars to act upon the stock so as to quickly disintegrate the same, the stock being-torn-or shredded and the tendency of the same to wrap around the roll being overcome. The bar embodying this invention creates a greatly increased suction through the stock so that the latter circulates more rapidly" and efliciently than with the devices now in use and the work is completed in less time and with less power-than has heretofore been necessary. i

While, for illustrative purposes, the invention has been shown embodied in singly spaced bars, the barsmay be arranged'in clusters,'and it will'be understoodthat the dimensions of the notches may be varied according to the characteristics of the stock to be treated. In practice, a plurality of interchangeable sets of bars will be provided so that, before starting work, the operator may apply to the roll the bars best adapted to the particular stock which is to be treated.

Having fully described my invention what I claim as new and desire tosecure by Lettens-Patent, is I 1. A beater roll having circumferentially spaced beater knives provided with spaced crenels in their working edges, the intervening portions of the working edge form ing merlons of substantial width, the crenels in acpljacent knives being relatively staggere i 2. A beater roll having circumferentially spaced beater knives, having spaced crenels in their working edges, the intervening portions of the working edges forming merlons of substantial width, the working edge of each bar beginning with a merlon and ending with a crenel, alternate bars being reversed so as to bring the merlons of each bar in edge .to begin w'th a merlon and end with a crenel,

opposite crenels in the bars on each side of it. i

3. As an article of manufacture, a beater bar having spaced crenels: in its working] edge, the intervening portions of the wor ing edges forming Inerlons of substantial width, there being an equal number ofcrenels' and merlons, thereby causing the work- 4. As an article of manuifacture, a beater bar having spaced crenelsfin 'llJS working edge, .the ntervening portlons of the workwidth, there being an equal number of'crenels and IDBIIOIIS, thereby causing the working 'edgeto begin with a merlon and end witha erenel; one: side of said bar being substantially flat the opposite side consisting of t-woplanes, one inclining from each edge, said planes meeting at a point intermediate. said edges, the first-merlon being atthe'lefthandend f the bar, when the flat side ofthe bar faces the observer and the crenelatededge is'uppermost, the last crenel terminating at the right hand'end of the bar. I

edge, the intervening portions of the working edge forming Inerlons of. substantial width, there being an equal number of crenels and lnerlons, thereby causing the working edge to begin with a merlon and end with a crenel; oneside of said bar being substantiallyfiat, the opposite side con sisting of two planes, one inclining from each edge, said planes meeting at a point intermediate'said dges, the first merlon being a t one end of the bar, the'last crenel terminating 'atiihe other end of the bar, the bottoms of said crenels being substantially ing edge forming merlons of substantial "co-incident with the apex of 'the an gle formed by said planes.

8. As an article of manufacture, a'beat'er,"

bar having, spaced crenels in its working edge, the intervening portions of the working edge forming merlons of substantial width, thewidth of the crenels and merlons being equal and there being an equal nllnl ber of crenels and merlons. Y I l ARTHUR, M. McPHIL-LIPS.

5. As an article of manufacture, a beater ba'r havingspaced crenels in its working edge, the interveningportions of the; working edge forming -merlons' of substantial width, there being-an equal number of crenels and-merlons,thereby causing the working edge to'begin with a merlon and end witha crenel; one side of-said bar, being substantially flat, the opposite side consis t' ing of-two planes, one inclining from each edge-,said planesnieeti-ng at a point intermediate said e'dges,-the first rnerlonbeing at'theiright hand end of the bar, when the fiat side of the barfaces the observer and the'crenelated edge is uppermost, the1last crenel terminati'ng latwthe left hand end of r I the hjar.

6. Incombinatio'n, a pair of beater bars, each bar having spaced crenels in its working edge, the intervening portions of the working edges forming me'rlons of substantial width, there being an equal number of crenels and merlons, thereby causing the Working 'edgewto begin with a merlo'n and end with a crenel; one side of each bar beingiadapted to-funct'io'nas the forward side of the bar when the beater roll of which it isa part revolves, the first merlonbeing at v the left hand end of one bar when the crenlelated edge is uppermost and said forward side faces the observer, the last crenel ter- 7 ,mi'natin'gyat'the other end of the bar, the

other barbeing the reverse of the first, so

' when the-bars are in juxtaposition in a roll their crenels will be in staggered relationhip. r

-7. As an 1 article of manufacture, a beater I 

